llvm-project/lld
Sam Clegg 74f9841977 [lld][WebAssembly] Allow use of statically allocated TLS region.
It turns out we were already allocating static address space for TLS
data along with the non-TLS static data, but this space was going
unused/ignored.

With this change, we include the TLS segment in `__wasm_init_memory`
(which does the work of loading the passive segments into memory when a
module is first loaded).  We also set the `__tls_base` global to point
to the start of this segment.

This means that the runtime can use this static copy of the TLS data for
the first/primary thread if it chooses, rather than doing a runtime
allocation prior to calling `__wasm_init_tls`.

Practically speaking, this will allow emscripten to avoid dynamic
allocation of TLS region on the main thread.

Differential Revision: https://reviews.llvm.org/D126107
2022-05-23 17:27:17 -07:00
..
COFF Force GHashCell to be 8-byte-aligned. 2022-04-18 08:46:03 -07:00
Common Cleanup codegen includes 2022-03-16 08:43:00 +01:00
ELF [lld][ELF] Support BFD name elf32-avr 2022-05-18 00:00:14 +00:00
MachO [lld-macho] Stop crash when emitting personalities with -dead_strip 2022-05-20 21:40:47 +00:00
MinGW [LLD][MinGW] Add --heap argument support 2022-01-30 00:01:45 +02:00
cmake/modules [CMake] Factor out config prefix finding logic 2022-01-07 20:16:18 +00:00
docs Revert D125410 "[ELF] Align the end of PT_GNU_RELRO to max-page-size instead of common-page-size" 2022-05-12 20:41:22 -07:00
include/lld [lld] Make error handling functions opaque 2022-02-17 11:54:57 -08:00
test [lld][WebAssembly] Allow use of statically allocated TLS region. 2022-05-23 17:27:17 -07:00
tools/lld [LLD] Fix issue in HIP due to unspecified order of evaluation of the function object 2022-02-08 19:12:15 -05:00
utils
wasm [lld][WebAssembly] Allow use of statically allocated TLS region. 2022-05-23 17:27:17 -07:00
.clang-format
.clang-tidy NFC: .clang-tidy: Inherit configs from parents to improve maintainability 2021-06-08 08:25:59 -07:00
.gitignore
CMakeLists.txt [lld] Require C++14 in LLD standalone build 2022-02-22 18:15:29 -05:00
CODE_OWNERS.TXT
LICENSE.TXT
README.md [doc] Place sha256 in lld/README.md into backticks 2021-01-12 10:19:40 -08:00

README.md

LLVM Linker (lld)

This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.

lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.

Benchmarking

In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.

It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz

The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.